摘要
β-Si Al ON-Si C composites were prepared using SiC particles and fines,silicon powder,AlN powder,α-Al_(2)O_(3)micropowder and flake graphite as starting materials.The influence of the graphite(particle size of≤45 and≤300μm,addition of 3.0%,5.5%,7.5%,and 10.0%,by mass)on the molten-alkali corrosion resistance was investigated.The results show that the moltenalkali resistance for theβ-Si Al ON-Si C sample with 7.5%of graphite(≤300μm)is optimal,showing the lowest mass change rate after corrosion and the highest retention ratios of cold modulus of rupture and hot modulus of rupture.
